SENTRON 3VA1120-6EF36-0BC0 — Line Protection MCCB with High Interrupting Capacity
At 240 V it interrupts 220 kA, at 415 V it handles 154 kA, and at 440 V it clears 121 kA — figures that place it in the high-breaking-capacity tier for industrial distribution panels where fault current levels are severe.
Thermal Derating and Ambient Constraints
At 55 °C it derates to 19.2 A, at 60 °C to 18.8 A, at 65 °C to 18.4 A, and at 70 °C to 18 A. For a panel that runs hot — say a non-ventilated enclosure near a furnace line — the 55 °C derating to 19.2 A is the figure to use in the load calculation, not the 20 A nameplate.
No communication function, no phase failure detection, no ground fault monitoring — this is a straightforward line-protection device without embedded metering or remote-trip capability.